Pyramids and Sphinx

c1930s interlocking cardboard jigsaw puzzle featuring an unsigned artistic study. Whether this is the work of C.E. Montford, artist for so many of the series, is unclear, as this particular example of the puzzle features an off square print, leaving the right edge truncated by some margin. This has also resulted in the inscription being partly missing.
It would appear to read:
"Pyramids & Sphinx, Giza, Egypt. Probably 6800 years old. Height of Great Pyramid 451 feet. Length each side 755 feet."

Artist: Unsigned
Date: c1930's
Brand: Welcom
Material: Cardboard
Nationality: British-England
Pieces: 200+
Series: Wonders of the World
Size: 14" x 10"
Theme: Famous Buildings
Title: Pyramids and Sphinx